Self-centering fixture-stud.



J. L. GOREY. SELF GENTBRING FIXTURE STUD.

APPLICATION FILED DEO.24,1907.

Patented Apr. 13, 1909.

'UNITED STATES rATENT ener-on.

JAMES L. ooREY, or INDIANAPOLIS, INDIANA. SELF-CENTERING FIXTUn-STUD.

No. 917,847'. Specication'of Letters Patent. Patented April 13, 1909. Application tied December 24,1190?. serial No. 407,970.

To all whom it may concern:

I-e it known that I, JAMES L. Conni', a citizen of the United States, residing at Indian- I l l l visio-n for the use of four screws in securing he device In place. Thiswall plate has a bowl-shaped member 21 on the outer side,

apolis, 1n the countyo Marion and State of Indiana, have lnvented certain new and useful Improvements 1n Self-@entering Fixtureand within this bowl-shaped portion I place Ie stud or hanger portion 22, the n'eck of 60 which is screw-threaded and extends down Studs, of which the following is a speciiica- A to a suitable distance below the remainder of tion. the structure, and the head 22 of which rests In placing electric light fixtures in buildwithin the bowl-shaped cavity 21 in plate ings, particularly of the so called fire-proof 21, being preferably approximately semiconstruction, the supports, or studs, as globular in form in order to viit properly they* are called,must be set in place some therein. L To prevent these two partsV from time prior to the completion of the work. revolving relatively to each other, an interther workmen, after these supports are so engaging form of adjacent surfaces, as an inplaced, frequently disturb them, so that their terlocking rib and groove 23 and 24, is pro- 70 positions are changed from where they were vided.. The screw-threaded depending neck originally placed. This causes them to prois long enough to receive a bowl-shaped nut ject at an oblique angle from the surface in- 25, which is adapted to screw up on said stead of to remain in their original perpenl neck and bear against the outside of the dicular or right-angular position in relation bowl-Shaped downwardly extending portion to the wall-surface, with the result that 21 on plate 21. The'remaining portion of when the chandeliers are attached thereto this screw-threaded neck receives the fixthey will also be thrown out of the re uired ture orI fixture coupling in the ordinary perpendicular or right-angular-to-wa -surl manner. f face position. The common way of correct- In operation, this xture, includin the `80 ing this has been to bend the iixture, by plates, studs and nuts, is placed in position, force, until it hangs as nearly perpendicular the same, as ordinary iixture su ports are. as possible. This results in both an imper- When it comes to the hanging of the fixtures, feet position, and in the endangering of the the nuts 25 are loosened slightly, when the integrity of the device. n

It is the object of my invention to produce a fixture support by which these disweight of the fixture Willbring it into perpendicular position, aided, of course, if necessary, by the hand" of the operator. The nut advantages may be overcome; and said in- 25 is then screwed up, and the fixture 1s yention therefore consists in an adjustable securely locked in place in the position decombination of parts, as will be hereinafter sired, without any bending or straining of the 90 more particularly described and claimed. same, or any of the parts associated there- "teferring to the accompanying drawings, with.

g i In Fig. 7, I have shown the head of the similar reference characters indicate similar stud 22 covered with insulating material 31.

l n l have also shown the interior of the nut 25 95 lined with insulating material` 32. This forms a perfect insulation between the several parts, and dispenses altogetherwith the the point indicated by the dotted line 3 3 in necessity of a separate'insulating joint of the tion; Fig. 2 a side elevation of the same kind commonly used. In Fig. 7, illustrating this insulated form of device, I show the fix- Y ture coupling 4l screwed onto the neck of the of the device, and Fig. 7 a view of such a destud 22. vice su'Hicient-ly varied in construction to ad- Having thus fully described my said inniit of embodying an insulating joint therevention, what I claim as new, and desire to sein, and thus dispensing' altogether with the cure by Letters Patent, is z'* insulating joint commonly used. A fixture support comprising a main wall- A suitable lwall plate 2] is secured to the plate having a bowl-shaped bearing member wall or ceiling by means of screws or otherwith an opening therethrough,. a iixturewisc as is usual. In Fig.. 1 I have shown prol carrying stud having a threaded neck and a 110 tion of its head being shown in elevation; Figs. el, 5 and 6 views of the separate parts head adapted to t Within the bowl-shaped I stud beyond the bowl-shaped nut and engagcavty in the Wall plate, with the threaded I in the same. neck thereof rojectng through the opening nwtness'Whereo Lhave hereunto set myV in the bowl, a owl-sha ed nut threadedupon hand and seal at Indianapolis, Indiana, this 5 the projected thread@ neck of the stud and i twentieth day of December, A. D. one thou- 1.3

fitting over'the convex outer side of the boWlsand nine hundred and seven.

shaped member of the Wall-plate, said Walll l JAMES L. COREY. 4 [L. 5.]

late and stud having interengaging surfaces YVtnesses: Y whereby relative rotation is prevented,` and a 'L CHESTER BRADFORD,

10 nut threaded upon the threaded neck of the TnoMAs-WT. MGMEANS. 

